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    • 4. 发明申请
    • PROCESS FOR PREPARING 1,6-HEXANEDIOL
    • US20110263907A1
    • 2011-10-27
    • US13133006
    • 2009-11-30
    • Olivier AbillardGerd-Dieter TebbenRolf PinkosTobias Wabnitz
    • Olivier AbillardGerd-Dieter TebbenRolf PinkosTobias Wabnitz
    • C07C31/20
    • C07C67/08C07C29/149C07D313/04C07C31/20C07C69/675C07C69/44
    • A process for preparing 1,6-hexanediol from a carboxylic acid mixture which comprises adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols and is obtained as a by-product of the oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-comprising gases by water extraction of the reaction mixture, by esterification and hydrogenation to hexanediol, which comprises a) the mono- and dicarboxylic acids present in the aqueous reaction mixture are reacted with a low molecular weight alcohol to give the corresponding carboxylic esters, b) the resulting esterification mixture is freed of excess alcohol and low boilers in a first distillation stage, c) in a second distillation stage, a separation is performed of the bottom product into an ester fraction essentially free of 1,4-cyclohexanediols and a fraction comprising at least the majority of the 1,4-cyclohexanediols, d) the ester fraction from (c) is catalytically hydrogenated and 1,6-hexanediol is obtained in a manner known per se by distilling the hydrogenation product, e) optionally the bottom product of stage c) is subjected to a further esterification reaction with a low molecular weight alcohol, the low molecular weight alcohol is distillatively removed on completion of the esterification reaction, then adipic diesters and 6-hydroxycaproic esters are substantially separated from 1,4-cyclohexanediols and high boilers in the remaining bottom stream by distillation and said adipic diesters and 6-hydroxycaproic esters are fed to stage c), which comprises performing at least one of the esterification reactions with a catalyst which comprises at least one element of groups 3-14, and adding a monomeric or oligomeric polyol with at least 3 hydroxyl functions after the esterification reaction. After step c) of the process according to the invention, in a third distillation stage, a stream comprising essentially methyl 6-hydroxycaproate can be at least partly removed and heated to temperatures above 200° C. under reduced pressure, which cyclizes 6-hydroxycaproic ester to caprolactone, and pure ε-caprolactone can be obtained from the cyclization product by distillation.
    • 7. 发明授权
    • Method for purifying cyclic ketones
    • 环酮纯化方法
    • US07790930B2
    • 2010-09-07
    • US12306815
    • 2007-06-27
    • Rolf PinkosGerd TebbenChristian MüllerHarald Rust
    • Rolf PinkosGerd TebbenChristian MüllerHarald Rust
    • C07C45/27
    • C07C45/85C07C45/34C07C45/62C07C2601/20C07C49/607C07C49/413
    • The present invention relates to a process for purifying a composition (I) comprising at least one cyclic ketone having from 7 to 16 carbon atoms, which comprises thermal treatment of the composition (I) with a catalyst comprising at least one transition metal and further purification by means of a process selected from the group consisting of distillation, extraction and crystallization. Furthermore, the present invention relates to a process for preparing cyclododecanone, which comprises such a purification, and the use of at least one catalyst comprising at least one transition metal for purifying a composition (I) comprising at least one cyclic ketone having from 7 to 16 carbon atoms by thermal treatment of the composition (I) with a catalyst comprising at least one transition metal.
    • 本发明涉及一种纯化包含至少一种具有7至16个碳原子的环酮的组合物(I)的方法,其包括用包含至少一种过渡金属的催化剂热处理组合物(I)并进一步纯化 通过选自蒸馏,萃取和结晶的方法。 此外,本发明涉及一种制备环十二烷酮的方法,其包括这种纯化,以及至少一种包含至少一种过渡金属的催化剂用于纯化组合物(I)的用途,所述组合物(I)包含至少一种具有7〜 16个碳原子通过用包含至少一种过渡金属的催化剂热处理组合物(I)。